Implement method to check if setup is complete

src/main/java/wtf/beatrice/uhccore/utils/UhcUtils.java

@@ -70,7 +70,7 @@ public class UhcUtils {
 
     public static void tpSpawnAndGiveItem(Player player)
     {
-        if(Cache.spawn == null)
+        if(Cache.isServerReady)
         {
             MessageUtils.sendLocalizedMessage(player, LocalizedMessage.ERROR_SERVER_NOT_SET_UP);
             return;

src/main/java/wtf/beatrice/uhccore/utils/configuration/FileUtils.java

@@ -127,6 +127,9 @@ public class FileUtils
             Cache.fireworksLocations.add(new Location(plugin.getServer().getWorld(world), x, y, z));
         }
 
+        // after reloading everything, check if the server is ready for gameplay.
+        Cache.isServerReady = isServerSetUp();
+
     }
 
     // Only reload the needed File.
@@ -282,4 +285,15 @@ public class FileUtils
             yaml = yamlConfig;
         }
     }
+
+    private static boolean isServerSetUp() {
+
+        if(Cache.spawn == null) return false;
+        if(Cache.lobbyWorlds == null || Cache.lobbyWorlds.isEmpty()) return false;
+        if(Cache.totalTeams <= 1) return false;
+        if(Cache.fireworksLocations == null) return false;
+        if(Cache.uhcWorlds == null || Cache.uhcWorlds.isEmpty()) return false;
+
+        return false;
+    }
 }